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<h1 id="prerequisite-and-license">Prerequisite and License</h1>
<h2 id="prerequisite">Prerequisite</h2>
<h3 id="gtk-4-on-a-linux-os">GTK 4 on a Linux OS</h3>
<p>This tutorial is about GTK 4 libraries. It is originally used on
Linux with C compiler, but now it is used more widely, on Windows and
MacOS, with Vala, Python and so on. However, this tutorial describes
only <em>C programs on Linux</em>.</p>
<p>If you want to try the examples in the tutorial, you need:</p>
<ul>
<li>PC with Linux distribution like Ubuntu or Debian.</li>
<li>GCC.</li>
<li>GTK 4. The stable version of GTK is 4.8.2 at present (13/Dec/2022),
but older version (4.0 or higher) may work. See <a
href="sec2.html">Section 2</a> for the installation for GTK 4.</li>
</ul>
<h3 id="ruby-and-rake-for-making-the-document">Ruby and rake for making
the document</h3>
<p>This repository includes Ruby programs. They are used to make GFM
(GitHub Flavoured Markdown) files, HTML files, Latex files and a PDF
file.</p>
<p>You need:</p>
<ul>
<li>Linux.</li>
<li>Ruby programming language. There are two ways to install it. One is
installing the distribution’s package. The other is using rbenv and
ruby-build. If you want to use the latest version of ruby, use
rbenv.</li>
<li>Rake. You don’t need to install it separately because it is a
standard library of Ruby.</li>
</ul>
<h2 id="license">License</h2>
<p>Copyright (C) 2020-2020,2023 ToshioCP (Toshio Sekiya)</p>
<p>GTK4-tutorial repository contains tutorial documents and programs
such as converters, generators and controllers. All of them make up the
‘GTK4-tutorial’ package. This package is simply called ‘GTK4-tutorial’
in the following description.</p>
<p>GTK4-tutorial is free; you can redistribute it and/or modify it under
terms of the following licenses.</p>
<ul>
<li>The license of documents in GTK4-tutorial is the GNU Free
Documentation License as published by the Free Software Foundation;
either version 1.3 of the License or, at your opinion, any later
version. The documents are Markdown, HTML and image files. If you
generate a PDF file by running <code>rake pdf</code>, it is also
included by the documents.</li>
<li>The license of programs in GTK4-tutorial is the GNU General Public
License as published by the Free Software Foundation; either version 3
of the License or, at your option, any later version. The programs are
written in C, Ruby and other languages.</li>
</ul>
<p>GTK4-tutorial is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU License
web pages for more details.</p>
<ul>
<li><a href="https://www.gnu.org/licenses/fdl-1.3.html">GNU Free
Documentation License</a></li>
<li><a href="https://www.gnu.org/licenses/gpl-3.0.html">GNU General
Public License</a></li>
</ul>
<p>The licenses above is effective since 15/April/2023. Before that, GPL
covered all the contents of the GTK4-tutorial. But GFDL1.3 is more
appropriate for documents so the license was changed. The license above
is the only effective license since 15/April/2023.</p>
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